diff options
| -rw-r--r-- | mm/slab.c | 2 | ||||
| -rw-r--r-- | mm/vmalloc.c | 7 |
2 files changed, 6 insertions, 3 deletions
diff --git a/mm/slab.c b/mm/slab.c index a041c5378dfa..05a391059fe1 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -2998,6 +2998,8 @@ EXPORT_SYMBOL(kzalloc); * kfree - free previously allocated memory * @objp: pointer returned by kmalloc. * + * If @objp is NULL, no operation is performed. + * * Don't free memory not originally allocated by kmalloc() * or you will run into trouble. */ diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 67b358e57ef6..13c3d82968ae 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -332,9 +332,10 @@ void __vunmap(void *addr, int deallocate_pages) * @addr: memory base address * * Free the virtually contiguous memory area starting at @addr, as - * obtained from vmalloc(), vmalloc_32() or __vmalloc(). + * obtained from vmalloc(), vmalloc_32() or __vmalloc(). If @addr is + * NULL, no operation is performed. * - * May not be called in interrupt context. + * Must not be called in interrupt context. */ void vfree(void *addr) { @@ -352,7 +353,7 @@ EXPORT_SYMBOL(vfree); * Free the virtually contiguous memory area starting at @addr, * which was created from the page array passed to vmap(). * - * May not be called in interrupt context. + * Must not be called in interrupt context. */ void vunmap(void *addr) { |